This web page used to contain details of all SPIRE data products. These definitions are now maintained centrally in the Herschel Product Definitions Document (HERSCHEL-HSC-DOC-0959), which can be found inside the Hipe Help system.
Additional information about SPIRE calibration trees is available on this web page.
If you really want the old SPIRE Product Definitions (which are no longer kept up to date), you can find the old page here.